<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Tool
 * @subpackage Framework
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: SearchConstraints.php 18951 2009-11-12 16:26:19Z alexander $
 */

/**
 * This class is an iterator that will iterate only over enabled resources
 *
 * @category   Zend
 * @package    Zend_Tool
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Tool_Project_Profile_Resource_SearchConstraints
{

	/**
	 * @var array
	 */
	protected $_constraints = array();

	/**
	 * __construct()
	 *
	 * @param array|string $options
	 */
	public function __construct($options = null)
	{
		if (is_string($options)) {
			$this->addConstraint($options);
		} elseif (is_array($options)) {
			$this->setOptions($options);
		}
	}

	/**
	 * setOptions()
	 *
	 * @param array $option
	 * @return Zend_Tool_Project_Profile_Resource_SearchConstraints
	 */
	public function setOptions(Array $option)
	{
		foreach ($option as $optionName => $optionValue) {
			if (is_int($optionName)) {
				$this->addConstraint($optionValue);
			} elseif (is_string($optionName)) {
				$this->addConstraint(array('name' => $optionName, 'params' => $optionValue));
			}
		}

		return $this;
	}

	/**
	 * addConstraint()
	 *
	 * @param string|array $constraint
	 * @return Zend_Tool_Project_Profile_Resource_SearchConstraints
	 */
	public function addConstraint($constraint)
	{
		if (is_string($constraint)) {
			$name   = $constraint;
			$params = array();
		} elseif (is_array($constraint)) {
			$name   = $constraint['name'];
			$params = $constraint['params'];
		}

		$constraint = $this->_makeConstraint($name, $params);

		array_push($this->_constraints, $constraint);
		return $this;
	}

	/**
	 * getConstraint()
	 *
	 * @return ArrayObject
	 */
	public function getConstraint()
	{
		return array_shift($this->_constraints);
	}

	/**
	 * _makeConstraint
	 *
	 * @param string $name
	 * @param mixed $params
	 * @return ArrayObject
	 */
	protected function _makeConstraint($name, $params)
	{
		$value = array('name' => $name, 'params' => $params);
		return new ArrayObject($value, ArrayObject::ARRAY_AS_PROPS);
	}

}